package com.company.jvm.classloader;

/**
 * @Classname param
 * @Description TODO
 * @Date 2021/8/4 9:25
 * @Created by ylr
 */
public class param {
    public static void main(String[] args) {
        StringBuilder a = new StringBuilder("123");
        param param = new param();
        a = param.build(a);
        System.out.println(a);

    }

    public StringBuilder build(StringBuilder a){
        a = build1(a);
        return  a;
    }
    public StringBuilder build1(StringBuilder a){
        a.append("7");
        return a;
    }
}
